Desafio completo

b2wcrawler/.gitignore

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+/.vagrant
+/scrapy.iml
+*.pyc
+_trial_temp*
+dropin.cache
+docs/build
+*egg-info
+.tox
+venv
+build
+dist
+.idea
+htmlcov/
+.coverage
+.pytest_cache/
+.coverage.*
+.cache/
+.mypy_cache/
+/tests/keys/localhost.crt
+/tests/keys/localhost.key
+Thumbs.db

b2wcrawler/README.md

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+# Webcrawler
+
+O robô, localizado em `b2crawler/spiders`, faz a varredura de todas as páginas do website *http://quotes.toscrape.com/*.  
+O formato dos registros segue o modelo indicado, e a pipeline faz o registro dos itens em uma coleção do mongodb `pauloandre_limaflores`.  
+
+As queries estão registradas no arquivo `queries.js`. Todas foram realizadas e verificadas utilizando o Mongo Shell ou o Compass.

b2wcrawler/b2wcrawler/items.py

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+# Define here the models for your scraped items
+#
+# See documentation in:
+# https://docs.scrapy.org/en/latest/topics/items.html
+
+import scrapy
+
+
+class QuoteItem(scrapy.Item):
+    title = scrapy.Field()
+    author = scrapy.Field()
+    tags = scrapy.Field()

b2wcrawler/b2wcrawler/middlewares.py

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+# Define here the models for your spider middleware
+#
+# See documentation in:
+# https://docs.scrapy.org/en/latest/topics/spider-middleware.html
+
+from scrapy import signals
+
+# useful for handling different item types with a single interface
+from itemadapter import is_item, ItemAdapter
+
+
+class B2WcrawlerSpiderMiddleware:
+    # Not all methods need to be defined. If a method is not defined,
+    # scrapy acts as if the spider middleware does not modify the
+    # passed objects.
+
+    @classmethod
+    def from_crawler(cls, crawler):
+        # This method is used by Scrapy to create your spiders.
+        s = cls()
+        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
+        return s
+
+    def process_spider_input(self, response, spider):
+        # Called for each response that goes through the spider
+        # middleware and into the spider.
+
+        # Should return None or raise an exception.
+        return None
+
+    def process_spider_output(self, response, result, spider):
+        # Called with the results returned from the Spider, after
+        # it has processed the response.
+
+        # Must return an iterable of Request, or item objects.
+        for i in result:
+            yield i
+
+    def process_spider_exception(self, response, exception, spider):
+        # Called when a spider or process_spider_input() method
+        # (from other spider middleware) raises an exception.
+
+        # Should return either None or an iterable of Request or item objects.
+        pass
+
+    def process_start_requests(self, start_requests, spider):
+        # Called with the start requests of the spider, and works
+        # similarly to the process_spider_output() method, except
+        # that it doesn’t have a response associated.
+
+        # Must return only requests (not items).
+        for r in start_requests:
+            yield r
+
+    def spider_opened(self, spider):
+        spider.logger.info('Spider opened: %s' % spider.name)
+
+
+class B2WcrawlerDownloaderMiddleware:
+    # Not all methods need to be defined. If a method is not defined,
+    # scrapy acts as if the downloader middleware does not modify the
+    # passed objects.
+
+    @classmethod
+    def from_crawler(cls, crawler):
+        # This method is used by Scrapy to create your spiders.
+        s = cls()
+        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
+        return s
+
+    def process_request(self, request, spider):
+        # Called for each request that goes through the downloader
+        # middleware.
+
+        # Must either:
+        # - return None: continue processing this request
+        # - or return a Response object
+        # - or return a Request object
+        # - or raise IgnoreRequest: process_exception() methods of
+        #   installed downloader middleware will be called
+        return None
+
+    def process_response(self, request, response, spider):
+        # Called with the response returned from the downloader.
+
+        # Must either;
+        # - return a Response object
+        # - return a Request object
+        # - or raise IgnoreRequest
+        return response
+
+    def process_exception(self, request, exception, spider):
+        # Called when a download handler or a process_request()
+        # (from other downloader middleware) raises an exception.
+
+        # Must either:
+        # - return None: continue processing this exception
+        # - return a Response object: stops process_exception() chain
+        # - return a Request object: stops process_exception() chain
+        pass
+
+    def spider_opened(self, spider):
+        spider.logger.info('Spider opened: %s' % spider.name)

b2wcrawler/b2wcrawler/pipelines.py

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+# Define your item pipelines here
+#
+# Don't forget to add your pipeline to the ITEM_PIPELINES setting
+# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html
+
+
+# useful for handling different item types with a single interface
+
+import pymongo
+from itemadapter import ItemAdapter
+
+
+class MongoDBPipeline:
+    collection_name = 'pauloandre_limaflores'
+
+    def __init__(self, mongo_uri, mongo_db):
+        self.mongo_uri = mongo_uri
+        self.mongo_db = mongo_db
+
+    @classmethod
+    def from_crawler(cls, crawler):
+        return cls(
+            mongo_uri=crawler.settings.get('MONGO_URI'),
+            mongo_db=crawler.settings.get('MONGO_DATABASE', 'items')
+        )
+
+    def open_spider(self, spider):
+        self.client = pymongo.MongoClient(self.mongo_uri)
+        self.db = self.client[self.mongo_db]
+
+    def close_spider(self, spider):
+        self.client.close()
+
+    def process_item(self, item, spider):
+        self.db[self.collection_name].insert_one(ItemAdapter(item).asdict())
+        return item

b2wcrawler/b2wcrawler/settings.py

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+# Scrapy settings for b2wcrawler project
+#
+# For simplicity, this file contains only settings considered important or
+# commonly used. You can find more settings consulting the documentation:
+#
+#     https://docs.scrapy.org/en/latest/topics/settings.html
+#     https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
+#     https://docs.scrapy.org/en/latest/topics/spider-middleware.html
+
+BOT_NAME = 'b2wcrawler'
+
+SPIDER_MODULES = ['b2wcrawler.spiders']
+NEWSPIDER_MODULE = 'b2wcrawler.spiders'
+
+
+# Crawl responsibly by identifying yourself (and your website) on the user-agent
+#USER_AGENT = 'b2wcrawler (+http://www.yourdomain.com)'
+
+# Obey robots.txt rules
+ROBOTSTXT_OBEY = True
+
+# Configure maximum concurrent requests performed by Scrapy (default: 16)
+#CONCURRENT_REQUESTS = 32
+
+# Configure a delay for requests for the same website (default: 0)
+# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay
+# See also autothrottle settings and docs
+#DOWNLOAD_DELAY = 3
+# The download delay setting will honor only one of:
+#CONCURRENT_REQUESTS_PER_DOMAIN = 16
+#CONCURRENT_REQUESTS_PER_IP = 16
+
+# Disable cookies (enabled by default)
+#COOKIES_ENABLED = False
+
+# Disable Telnet Console (enabled by default)
+#TELNETCONSOLE_ENABLED = False
+
+# Override the default request headers:
+#DEFAULT_REQUEST_HEADERS = {
+#   'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
+#   'Accept-Language': 'en',
+#}
+
+# Enable or disable spider middlewares
+# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
+#SPIDER_MIDDLEWARES = {
+#    'b2wcrawler.middlewares.B2WcrawlerSpiderMiddleware': 543,
+#}
+
+# Enable or disable downloader middlewares
+# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
+#DOWNLOADER_MIDDLEWARES = {
+#    'b2wcrawler.middlewares.B2WcrawlerDownloaderMiddleware': 543,
+#}
+
+# Enable or disable extensions
+# See https://docs.scrapy.org/en/latest/topics/extensions.html
+#EXTENSIONS = {
+#    'scrapy.extensions.telnet.TelnetConsole': None,
+#}
+
+# Configure item pipelines
+# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
+ITEM_PIPELINES = {
+   'b2wcrawler.pipelines.MongoDBPipeline': 300,
+}
+
+MONGO_URI = "mongodb://localhost:27017"
+MONGO_DATABASE = "quotestoscrape"
+
+
+# Enable and configure the AutoThrottle extension (disabled by default)
+# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
+#AUTOTHROTTLE_ENABLED = True
+# The initial download delay
+#AUTOTHROTTLE_START_DELAY = 5
+# The maximum download delay to be set in case of high latencies
+#AUTOTHROTTLE_MAX_DELAY = 60
+# The average number of requests Scrapy should be sending in parallel to
+# each remote server
+#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
+# Enable showing throttling stats for every response received:
+#AUTOTHROTTLE_DEBUG = False
+
+# Enable and configure HTTP caching (disabled by default)
+# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
+#HTTPCACHE_ENABLED = True
+#HTTPCACHE_EXPIRATION_SECS = 0
+#HTTPCACHE_DIR = 'httpcache'
+#HTTPCACHE_IGNORE_HTTP_CODES = []
+#HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'

b2wcrawler/b2wcrawler/spiders/__init__.py

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+# This package will contain the spiders of your Scrapy project
+#
+# Please refer to the documentation for information on how to create and manage
+# your spiders.

b2wcrawler/b2wcrawler/spiders/quotes_spider.py

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+import scrapy
+from ..items import QuoteItem
+
+
+class QuotesSpider(scrapy.Spider):
+    name = "quotes"
+
+    start_urls = [
+        'http://quotes.toscrape.com/page/1/',
+    ]
+
+    def parse(self, response):
+        for quote in response.css('div.quote'):
+            item = QuoteItem()
+
+            item['title'] = quote.css('span.text::text').get()
+            item['author'] = {
+                'name': quote.css('small.author::text').get(),
+                'url': 'http://quotes.toscrape.com' + quote.css('span a::attr(href)').extract()[0],
+            }
+            item['tags'] = quote.css('div.tags a.tag::text').getall()
+
+            yield item
+
+
+        next_page = response.css('li.next a::attr(href)').get()
+        if next_page is not None:
+            next_page = response.urljoin(next_page)
+            yield scrapy.Request(next_page, callback=self.parse)

b2wcrawler/queries.js

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+//Quantas citações foram coletadas?
+db.pauloandre_limaflores.count()
+
+//Quantas tags distintas foram coletadas?
+db.pauloandre_limaflores.distinct( "tags" )
+
+//Quantas citações por autor foram coletadas? (exemplo abaixo)
+db.pauloandre_limaflores.aggregate(
+    [{
+        $match: {
+
+        }
+    }, {
+        $group: {
+            _id: '$author.name',
+            total: {
+                '$sum': 1
+            }
+        }
+    }]
+)

b2wcrawler/scrapy.cfg

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+# Automatically created by: scrapy startproject
+#
+# For more information about the [deploy] section see:
+# https://scrapyd.readthedocs.io/en/latest/deploy.html
+
+[settings]
+default = b2wcrawler.settings
+
+[deploy]
+#url = http://localhost:6800/
+project = b2wcrawler